To find the coefficient of permeability it is necessary to determine it through experimentation. The investigation conducted was based on finding and analyzing the permeability coefficients obtained in the laboratory, respect to the theoretical formulations Allen Hazen, and Schlichter Terzaghi, to make a comparative analysis and find margins of error to help understand and identify behavior these sands in this land about what theoretical. To find these factors was necessary from the implementation and testing laboratory, such as: Granulometry, specific gravity of solids, permeability (method of constant head), etc.. Moreover it was necessary to bear in mind that these values also depend on variables such as: effective diameter of Hazen (D10), the porosity (n), temperature (t), among others. Respect to the analysis that was obtained from the different calculations from laboratory testing, was identified other constants more agreeing to the sands tested in the area of the department ...